A blood moon is usually a more rare occasion, However for the area your in they're very common. Many legends have been speculated because of the common blood moons

one legend is named "Chi no yokubo no shojo", a girl who appears at night to lure people into a small area for "fun activities" for the rest of time

during one of these blood moons, you walk out for some fresh air before you hear a voice behind you "heyyy!! Over here! Do you wanna be my new friend? :D"